http://ucanr.edu/blogs/UCDWeedScience/?utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed Weed control, management, ecology, and minutia en-us UC ANR http://cyber.law.harvard.edu/rss/ Wed, 15 May 2013 07:47:10 PST Wed, 15 May 2013 07:47:10 PST UC ANR Here's an article from the UCCE San Joaquin County Field Notes newsletter (May 2013.) Medusahead has been invading our rangelands for years. The Natural Resource Conservation Service (NRCS) has photo documentation from the early 1980’s with large stands of medusahead on the east side of the county. Medusahead can also be found in the Livermore area but until this spring I have never seen it on San Joaquin County’s west side. It is a very invasive grass that can potentially reduce...
]]> Tue, 14 May 2013 11:04:50 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10382&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10382 Seeing yellow these days? As in…those brightly-blooming yellow-flowering shrubs along roads and hillsides from the Bay Area to the Sierra Nevada foothills. Broom—French, Spanish, and Scotch—is in full spring bloom, even at higher elevations. Spanish broom, Spartium junceum (also known as Genista juncea), is a heat-loving, deciduous, flowering shrub with yellow, pea-like flowers in the family Fabaceae. Originally used as a landscape shrub, it has escaped into wild lands and...
]]> Sun, 12 May 2013 22:32:56 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10374&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed rmillercripps@ucanr.edu(Rebecca Miller-Cripps) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10374
]]> Tue, 07 May 2013 10:03:48 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10332&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed rgwilson@ucanr.edu(Rob Wilson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10332 Glyphosate-resistant (GR) Palmer amaranth is, currently, the most significant weedy pest of cotton grown in the SE US. In order to reduce population size, maximize herbicide efficacy and prevent the development of further resistances, cotton growers must consider using additional mechanical (i.e. tillage) and cultural (i.e. cover crops) weed management strategies. Small plot experiments conducted in Georgia between 2008 and 2010 showed that the use of deep-tillage plus a heavy rye cover crop,...
]]> Fri, 03 May 2013 16:56:42 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10319&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed lmsosnoskie@ucdavis.edu(Lynn M. Sosnoskie) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10319
]]> Fri, 03 May 2013 11:37:00 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10320&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10320 Since it was first identified in 2004, glyphosate-resistant Palmer amaranth has become the most significant weedy pest of cotton in the Southeastern United States. When acceptable control is not realized, and Palmer amaranth is allowed to set seed, population densities can become quite high in infested fields. For example, research conducted by the University of Georgia indicated that Palmer amaranth seed densities exceeded 35,000 seeds per m2 in a cotton field where the glyphosate-resistant...
]]> Wed, 01 May 2013 15:16:59 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10297&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed lmsosnoskie@ucdavis.edu(Lynn M. Sosnoskie) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10297
]]> Wed, 01 May 2013 11:42:37 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10296&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed lmsosnoskie@ucdavis.edu(Lynn M. Sosnoskie) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10296
]]> Fri, 26 Apr 2013 14:44:24 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10263&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10263
]]> Wed, 24 Apr 2013 12:38:22 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10235&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=10235
]]> Mon, 22 Apr 2013 15:07:41 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9853&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed cjmcdonald@ucanr.edu(Chris McDonald) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9853 The newest issue of the journal "California Agriculture" (April-June 2013) published by the University of California and UC Division of Agriculture and Natural Resources just came out and has two articles written by UC weed researchers Check out the whole issue here or the specific articles at the links below. For switchgrass cultivated as biofuel in California, invasiveness limited by several stepsby Joseph M. DiTomaso, Jacob N. Barney, J. Jeremiah Mann, and Guy Kyser...
]]> Tue, 16 Apr 2013 17:01:45 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9767&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9767 In ailanthus territory, you have to be careful not to park for too long in one place.
]]> Tue, 16 Apr 2013 09:00:39 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9759&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gbkyser@ucdavis.edu(Guy B Kyser) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9759 This is a new-to-me weed, even though it's growing all around Robbins Hall where I've been working since typewriter times. Fumitory (Fumaria spp.) is a lacy, vine-like annual native to Europe. Looks sort of like parsley, though it's not related. It doesn't have tendrils, but it has 'grabby' foliage, and it drapes over other plants and fences by coiling its stem ends. Fumitory is in the poppy family (Papaveraceae). Its flowers are small, white to purplish, and bilateral in axillary racemes. I...
]]> Mon, 15 Apr 2013 10:24:03 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9748&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gbkyser@ucdavis.edu(Guy B Kyser) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9748 I wanted to share a link today to a paper published by CAST, the Council for Agricultural Science and Technology. This paper, entitled "Herbicide-resistant weeds threaten soil conservation gains: finding a balance for soil and farm sustainablity", was released about a year ago and addresses one of the less obvious issues resistance imposes - soil erosion. This paper can be viewed or downloaded (free!) at the link above. The development and adoption of effective postemergence herbicides, both...
]]> Fri, 12 Apr 2013 14:04:13 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9741&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9741 Cilantro was produced on 5,543 acres in Monterey and Ventura Counties in 2011. The production of cilantro has shifted to high density 80-inch wide beds and a large proportion is now mechanically harvested. Hand weeding high density beds is very expensive and reduces the economic viability of this crop. As a result, there is a need for excellent weed control. Two broadleaf herbicides were registered on cilantro: Prefar and Caparol. Prefar was registered for a number of years and provides good...
]]> Mon, 08 Apr 2013 09:00:59 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9721&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed gperez@ucdavis.edu(Gale Perez) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9721
]]> Fri, 05 Apr 2013 08:43:56 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9700&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9700 A quick post today to share a link to the recently revised "UC IPM Pest Management Guidelines for Kiwifruit" (UC ANR Publication #3449). You can download the whole document as a pdf here, or use it online at the above link. Although there are also well-written sections on general kiwi pest management, as well as specific information on insects, mites, and diseases of kiwifruit, since this is the Weed Science blog, I'd better post a link directly to the Integrated Weed Management section...
]]> Thu, 04 Apr 2013 18:05:50 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9698&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9698
]]> Mon, 01 Apr 2013 14:59:25 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9660&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed jaroncoroni@ucanr.edu(John A Roncoroni) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9660
]]> Thu, 28 Mar 2013 12:10:30 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9643&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed bhanson@ucdavis.edu(Brad Hanson) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9643
]]> Mon, 25 Mar 2013 11:57:01 PST http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9603&utm_source=RSS&utm_medium=RSS&utm_campaign=RSS%2BFeed cawilen@ucanr.edu(Cheryl A. Wilen) http://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=9603